1225783077531 has 4 divisors (see below), whose sum is σ = 1634377436712. Its totient is φ = 817188718352.

The previous prime is 1225783077529. The next prime is 1225783077559. The reversal of 1225783077531 is 1357703875221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1225783077531 - 2¹ = 1225783077529 is a prime.

It is a super-2 number, since 2×1225783077531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1225783077581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204297179586 + ... + 204297179591.

It is an arithmetic number, because the mean of its divisors is an integer number (408594359178).

Almost surely, 2^{1225783077531} is an apocalyptic number.

1225783077531 is a deficient number, since it is larger than the sum of its proper divisors (408594359181).

1225783077531 is an equidigital number, since it uses as much as digits as its factorization.

1225783077531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408594359180.

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 1225783077531 in words is "one trillion, two hundred twenty-five billion, seven hundred eighty-three million, seventy-seven thousand, five hundred thirty-one".